I have found most, if not all, my therapists and psychiatrists were religious or spiritual in some way, but it rarely came up. Most would answer if i asked what they believed in, but would not offer that info without provocation. Unless they are specifically oriented with a particular religion or spirituality (pastoral counseling, a heavily religious treatment center, something like that), their religion has nothing to do with my personal growth. I would be really bothered if someone pushed the concept of religion or spirituality on me in therapy (and actually have been turned off to treatment providers who tried this early on).